books.google.ca - The Essence of Analgesia and Analgesics is an invaluable practical resource for clinicians giving pain relief in any clinical setting, describing the pharmacologic principles and clinical use of all available pain medications. As well as detailed overviews of pain processing and analgesic theory, sections...http://books.google.ca/books/about/The_Essence_of_Analgesia_and_Analgesics.html?id=ZwPIjKg0XukC&utm_source=gb-gplus-shareThe Essence of Analgesia and Analgesics